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The initial configuration folder should look like something like this: config/ |-- action.d | |-- dummy.conf | |-- foo.conf | |-- hostsdeny.conf | |-- iptables.conf | |-- mail-whois.conf | `-- mail.conf |-- fail2ban.conf |-- filter.d | |-- apache-auth.conf | |-- sshd.conf | `-- vsftpd.conf `-- jail.conf* filter : a filter defines a regular expression which must match a pattern corresponding to a log-in failure or any other * expression* action : an action defines several commands which are executed at different moments* jail : a jail is a combination of one filter and one or several actions. Fail2ban can handle several jails at the same time* client : refers to the script fail2ban-client* server : refers to the script fail2ban-serverThe default configuration for the SSH filter should not require too much changes. You can adapt the regular expression to meet your needs. The most recent official user manual for fail2ban as of this writing:* http://www.fail2ban.org/wiki/index.php/MANUAL_0_8